Speaker
Description
This study presents Monte Carlo simulations using the FLUKA 4-4 package coupled with
the DMPJET model to analyze the response of neutron monitors at the Princess
Sirindhorn Neutron Monitor (PSNM) in Thailand, the South Pole Neutron Monitor, and a
mobile semi-leaded neutron monitor (Changvan) during a latitude survey. The
atmospheric and detector simulations accounted for deadtime corrections and employed
monthly solar modulation parameters alongside galactic cosmic ray (GCR) models to
calculate count rates and yield functions. Key results include the comparison of actual
and simulated count rates at PSNM from September 2022 to October 2023 and time-
series analysis of count rate trends at the South Pole, covering data from 1977 to the
present with a detailed focus on trends from 2010 onwards. Differential and integral
response functions were also determined for varying rigidity cutoffs, including the
Changvan monitor. Future work aims to enhance the simulation accuracy by
incorporating more frequent solar modulation parameters and increasing statistical
precision.
This research work was partially supported by Chiang Mai University, CMU Proactive
Researcher [grant number 905/2567] and the Seed International Initiatives.
